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A Computational Analysis of a Methanol Steam Reformer Using Phase Change Heat Transfer

Author

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  • Hyemin Song

    (Mechanical Engineering, Graduate School, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

  • Younghyeon Kim

    (Mechanical Engineering, Graduate School, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

  • Dongjin Yu

    (Mechanical Engineering, Graduate School, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

  • Byoung Jae Kim

    (School of Mechanical Engineering, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

  • Hyunjin Ji

    (Agency for Defense Development, Yuseong P.O.Box 35-44, Daejeon 305-600, Korea)

  • Sangseok Yu

    (School of Mechanical Engineering, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

Abstract

A methanol steam reformer converts methanol and steam into a hydrogen-rich mixture through an endothermic reaction. The methanol reformer is divided into a reaction section and a heat supply section that transfers thermal energy from 200 to 300 °C. This study presents the behavior of the methanol steam reforming reaction using the latent heat of the steam. A numerical analysis was separately conducted for two different regimes assuming constant heat flux conditions. A methanol steam reformer is an annulus structure that has a phase change heat transfer from an outer tube to an inner tube. Different from the steam zone temperature in the tube, the latent heat of steam condensation decreases, and there is a gradual between-wall temperature decrease along the longitudinal direction. Since the latent heat of steam condensation is very sensitive to the requested heat from the reformer, it is necessary to consider a refined design of a methanol reformer to obtain a large enough amount of heat by steam condensation.

Suggested Citation

  • Hyemin Song & Younghyeon Kim & Dongjin Yu & Byoung Jae Kim & Hyunjin Ji & Sangseok Yu, 2020. "A Computational Analysis of a Methanol Steam Reformer Using Phase Change Heat Transfer," Energies, MDPI, vol. 13(17), pages 1-14, August.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4324-:d:401940
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    References listed on IDEAS

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    1. Iulianelli, A. & Ribeirinha, P. & Mendes, A. & Basile, A., 2014. "Methanol steam reforming for hydrogen generation via conventional and membrane reactors: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 355-368.
    2. Chein, Reiyu & Chen, Yen-Cho & Chung, J.N., 2013. "Numerical study of methanol–steam reforming and methanol–air catalytic combustion in annulus reactors for hydrogen production," Applied Energy, Elsevier, vol. 102(C), pages 1022-1034.
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    Cited by:

    1. Liping Pang & Kun Luo & Shizhao Yu & Desheng Ma & Miao Zhao & Xiaodong Mao, 2020. "Study on Heat Transfer Performance of Antifreeze-R134a Heat Exchanger (ARHEx)," Energies, MDPI, vol. 13(22), pages 1-14, November.
    2. Dongjin Yu & Byoungjae Kim & Hyunjin Ji & Sangseok Yu, 2022. "Sensitivity Analysis of High-Pressure Methanol—Steam Reformer Using the Condensation Enthalpy of Water Vapor," Energies, MDPI, vol. 15(10), pages 1-18, May.

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